Glossary: P-wave
Primary or compressional seismic wave. It is the fastest of the seismic waves, traveling 5.5–7.2 kilometers per second in the crust and 7.8–8.5 kilometers per second in the upper mantle.
Primary or compressional seismic wave. It is the fastest of the seismic waves, traveling 5.5–7.2 kilometers per second in the crust and 7.8–8.5 kilometers per second in the upper mantle.